Apex chat card line question

How do you make the line transparent from the latest point onward? I don’t want to see the flat line in front of the latest point. Also I want the graph line to start a 0 from whenever i start the probes and track to the current temp as time progresses, the graph span can show a few hours in the future… i am struggling to get the correct configuration on this, any guidance is appriciated.

type: custom:apexcharts-card
header:
  show: true
  title: 'Probe #1'
  show_states: true
  colorize_states: true
all_series_config:
  stroke_width: 2
  type: area
color_list:
  - darkorange
  - red
  - cyan
series:
  - entity: sensor.meater_probe_internal_1
    name: Internal
    type: line
  - entity: sensor.meater_probe_target_1
    name: Target
    type: line
  - entity: sensor.meater_probe_ambient_1
    name: Ambient
    type: line
apex_config:
  tickAmount: 4
  dataLabels:
    enabled: true
    dropShadow:
      enabled: true
  chart:
    zoom:
      enabled: true
    toolbar:
      show: true
      tools:
        zoom: true
        zoomin: true
        zoomout: true
        pan: true
        reset: true
cache: true
graph_span: 6h
span:
  start: hour